Grate-bar.



J. H. DBTZ.

GRATB BAR.

APPLICATION PILED'APR.1S,1914.

Patented Sept. 22, 1914;.

2 SHEETS-SHEET 1 lmmee.

J. H. DIETE GRATE BAR.

APPLICATION HLED APBJB, 1914.

Ll L590` Patented Sept. 22, 19M'.

2 SHEETS-SHEET 2.

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Specication of Letters Patent. Application yfiled April 18, 191,4. Serial No.

Patented Sept.. 22, 191%. seam.

To all whom t may concern:

Be it known that I, JOHN H. DIETZ, a citizen of the United States, and a resident of ('lleveland, county of Cuyahoga, and State of Ghio, have invented a new and useful Improvement in Grate-Bars, of which the following is a specification, the principle. of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

he present invention relates to grate bars.

Among its objects are the provision of-a bar, several of which may be 'so assembled that the stantially air-tight and yet allow for expension and contraction; and the provision of effective yet simple operative means for controlling the How of air through the grate.

To the accomplishment of the foregoing and related ends, said invention, then, confull n described and particularly pointed out 1n the claims.

The annexed drawing and the, following description set forth in detail certain mechamsm embodying the invention, such disclosed means constituting, however, but one Y of various mechanical formsin which the principle of the invention may be used.

In said annexed drawing z-'Figure 1 is a broken top plan of the grate bar; Fig. 2 is a broken side elevation thereof; Fi 3 is a vertical section of the bar on the l(line A-A in Figs. 1 and 2, with adjacent bars shown in broken section; Fig. 4 isA a top plan of a control block; Fig. 5 is a section on the line B-B in Fig. 4, and Fig. 6 is a section of a-,bar on the plane of Fig. 3, with a block shown in alternative positionsv in full and dotted lines.

The grate bar comprises a top plate 1 and side members 2, the top having projections 3 at ends by which the bar is mounted. At' one'side of the bar is a extends along the length of the bar and on the opposite side is a similarly extendlng flange 5 whose upper surface lies in approximately the sameplane as the under surface of the flange 4. p

The bar is provided in its top with a plurality of openings 6 which are preferably circular, and the wall of which is beveled upwardly. A rib 8, stayed at intervals by brackets 9, extends longitudinally at the center of the bar just below the openings 6,

joints between the bars will be sub- .x

flange 4 which and the wall of each opening is formed with' wo recesses 7 opposite each other on the diameter along which the rib 8 extends.

In assembling any desired number of bars to form a grate, the upper flange 4 of eachv `surface of the flange 4 and the" opposed side of the adjacent bar, andvb'etween the lateral The peculiar construction of grate bar provided yy the present invention permits a number of grate bars to be assembled into a grate, so that the j oints between them are air-tight becausepthe meeting surfaces of the flanges are in intimate contact; at the same time expansion andcontraction of the bars is freely permitted because of the provision of the expansion space between the sides of the anges and the adjacent bars. j Eachof theopenings controlled by a block 10. Each block 10, which is preferably circular, a beveled edge, so that when the block is seated in the opening 6 the peripheral passage `between the block and openin may be varied by varying vertica position of the block.

of supplementa air passages 11. 0n its under side thellolock is formed with any annular extension 12. The extension 12 is formed' with any desired number of slots whose top walls are at different vertical positions, and whose axes are angularly dis posed relative to each other. As illustrated the circular block 10 is formed on one diameter with a slot 18 and on a diameter at right angles to that of :the slot 13 with a slot 14, the top wall of which is below the level of the top wall of the slot 13. At its periphery the block-is formed with two opposite lugs 15 on thevdiameter ofthe slot 13, and with two opposite lugs 16 yon the diameter of the slot 14; the bottom surfaces ofthe lugs 15l lie in a plane a distance below the plane of the bottom surfaces of the lugs 6 corresponding to the distance from the top wall of the slot 13 to the top wall of the slot 14.

One of the blocksl() yis seated in each of 6 is designed to be isformed with the wall of thel the The block also is provided with any desired -numlr prevent the block from tipping;

the openings 6 and is supported by the top wall of either the slot 13 or the slot 14 resting on the rib 8. byengagement of the slot 13 with the rib 8 the lugs 16, which are opposite each other on a diameter at a right angle to the rib, Contact with the wall of the opening 6 and prevent the block from tipping. lIn this osition of the block the lugs 15 are not unctioning, and in order to prevent their striking the wall of the opening the recesses 7 are provided to receive them. If the block be supported in higher position by engagement of the slot 14 with the rib 8, the lugs 15 contact with the wall of the opening and the lugs 16 have less vertical extent than the lugs .15 and', in the raised position of the block, they lie above the wall of the opening.

The invention therefore provides an eifective, and at the same time very simply operable device for controlling the riiow of air upwardly through the grate to the fuel. If

a block besupported by engagement of the slot 13 with the rib, with the lugs 16 contacting with the wall of the opening, the peripheral passage around the block will be of considerably less area than if the block be supported by engagement of the slot 14 with the rib with the lugs 15 contacting with the wall of the opening. It is only necessary to lift a block with any 4suitable device, turn it, and then drop it back into place in its opening, in order to control the amount of air, flowing through the grate. It is obvious that the block may be so formed as to provide for supporting it in its opening in more than two vertical positions.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following' claims or the equlvalent of such stated means be employed.

I therefore particularly point out and distinctly claim as myA invention 1. A grate bar provided in its top with an opening; a support adjacent the opening;

and a block designed to control the opening, the block being provided at different ver- If the block be supported' being provided at 'of diametrically tical and diametrical positions on its nder side with rests alternatively engaging the support.

2. A grate bar provided in its top with an opening; a bar extending diametrically across, but below, the opening; and a block designed to control the opening, the block being provided at different vertical and diametrical positions on its under side with downwardl opening slots alternatively engaging the ar.

3. A grate bar provlded in its top with an opening having a beveled wall; a bar extending diametrically' across, but below, the opening, the opening having two recesses in its wall adjacent the respective ends of the bar; and a block conforming in contour with the opening and having 'a beveled edge, the block dierent vertical and diavrnetrical positions on its under side with slots alternatively .engaging the bar, and being provided on its periphery with sets opposite lugs adaptedj alternatively to contact with the wall of the opening, the sets of lugs being formed at different vertical 'positions corresponding with they slots, and the lower set lying in the recesses when the other lugs are in contacting position. i

4. A grate, comprising ka plurality of grate bars respectively provided at each side with a longitudinally extending flange and the under surface of one flange lying approximately in a plane with the upper surface of the other flange, the under surface of the higher flange of each bar overlying and contacting with the upper surface of the lower liange of the adjacent bar, each bar having a plurality of openings in its top; a support in each bar extending adjacent to the several openings; and a plurality of blocks designed to control the respective openings, each block being provided at different vertical and diametrical positions Aon its under side with slots y alternatively engaging the adjacent Sulsportlib h 7nd fA 11 igne yme t is1 t a `o pr' ,1914.

Jonir H. Din'rz.

Attested by- Ronnr SEE, I-I. M. KATHE. 

